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DTC INSPECTION [EPS CONTROL MODULE]

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2016 – MX-5 – Steering

DTC INSPECTION [EPS CONTROL MODULE]

1. Connect the M-MDS to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

a. Select “Self Test”.

b. Select “All CMDTCs”.

3. Verify the DTC according to the directions on the screen.

NOTE:

  • Snapshot data appears at the top of the help screen when the displayed DTC is selected.

  • Snapshot data stores the currently detected DTC data.

4. After completion of repairs, clear all DTCs stored in the module. (See CLEARING DTC [EPS CONTROL MODULE].)

Snapshot Data Table

NOTE:

  • Refer to PID monitor table for confirm the EPS system operation status while the EPS control module does not store the DTC. (See PID/DATA MONITOR TABLE [EPS CONTROL MODULE].)

  • Snapshot data items are not displayed, according to detected DTC.

—: Not applicable

Snapshot data item

Unit

Definition

Data read/use method

Corresponding data monitor items

AAT

°C, °F

Ambient air temperature

APP_STATUS

Accelerator Pedal Off/

Under 20%/

Over 20%/

FAIL

Accelerator pedal position

CEN_TRQ_S

Nm

Center value of torque sensor

CFG_STATUS

Config Complete/

Not Configured/

Config Error

Configuration status

ECT_STATUS

Under 0 degrees C/

0 – Under 80 degrees C/

Over 80 degrees C/

FAIL

Engine coolant temperature status

ECU_IN_TMP

°C, °F

ECU internal temperature

ECU_IN_TMP

ENG_RPM

RPM

Engine speed

ENG_RPM

IC_VPWR

V

Instrument cluster power supply

  • The EPS control module constantly receives the power supply voltage value of the instrument cluster sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS control module records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the M-MDS.

IG-ON_TIMER

hh:mm:ss*1

Elapsed time since ignition was switched ON

NOTE:

  • The instrument cluster records the elapsed time since the ignition was switched ON.

  • The EPS control module constantly receives the elapsed time since the ignition was switched ON sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS control module records the elapsed time since the ignition was switched ON when the DTC was detected, and it is displayed in the M-MDS.

MT_CURRENT

A

EPS motor control current

MT_CURRENT

OH_CR_C

No/Yes

Current overheat protection control (complete)

OH_CR_C

OH_CR_M

No/Yes

Current overheat protection control (middle)

OH_CR_M

OH_HIST_C

No/Yes

History of overheat protection control (complete)

OH_HIST_C

OH_HIST_M

No/Yes

History of overheat protection control (middle)

OH_HIST_M

OH_IG_CNT_C

The number of times the ignition is switched ON during the period from when overheat protection control (complete) is finished to the time the next overheat protection control (complete) is started

  • Displays a maximum number of 255 times in which the ignition is switched ON until the first overheat protection control (complete) is started.

  • During overheat protection control (complete), the number of times the ignition is switched ON is not counted, and 0 is displayed.

OH_IG_CNT_C

OH_IG_CNT_M

The number of times the ignition is switched ON during the period from when overheat protection control (middle) is finished to the time the next overheat protection control (middle) is started

  • Displays a maximum number of 255 times in which the ignition is switched ON until the first overheat protection control (middle) is started.

  • During overheat protection control (middle), the number of times the ignition is switched ON is not counted, and 0 is displayed.

OH_IG_CNT_M

PWR_MODE_KEY

Key Out/Key Recently Out/Key Approved (Position 0)/Post Accessory (Position 0)/Accessory (Position 1)/Post Ignition (Position 1)/Ignition On (Position 2)/Running (Position 2)/Running – Starting In Progress (Position 2)/Crank (Position 3)

  • Key Out: Ignition switched off

  • Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched off

  • Accessory (Position 1): Ignition is switched to ACC

  • Post Ignition (Position 2): Elapsed time within 3 s since ignition was switched ON

  • Ignition On (Position 2): Ignition switched ON (engine off)

  • Running (Position 2): Ignition switched ON (engine on)

  • Running – Starting: Cranking condition

  • The EPS control module constantly receives the ignition switch status sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS control module records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.

RPM_STATUS

Engine Stop/

Under 1500 rpm/

Over 1500 rpm/

FAIL

Engine RPM status

  • The EPS control module constantly receives the ignition switch status sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS control module records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.

SHIFT_STATUS

P/N

D/

R/

FAIL

Shift position status

  • The EPS control module constantly receives the selector lever position sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS control module records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.

STR_ANG

°

Steering wheel angle

STR_ANG

STR_ANG_EST

°

Steering wheel angle (estimated absolute angle)

STR_AB_EST

STR_ROT_SPD

°/s

Steering wheel rotation speed

STR_ROT_SPD

STR_TRQ_S_M

Nm

Steering shaft torque (Main)

STR_TRQ_S_M

STR_TRQ_S_S

Nm

Steering shaft torque (Sub)

STR_TRQ_S_S

TOTAL_DIST

km, ft, mi

Accumulated total traveled distance from completion of vehicle until EPS control module detects DTC (Odometer value in instrument cluster)

The distance traveled when the EPS control module detected a DTC can be calculated by performing the following procedure.

  1. Verify the odometer value in the instrument cluster.

  2. Verify the snap shot data item TOTAL_DIST.

  3. Subtract 2 from 1.

TOTAL_TIME

hh:mm:ss*1

Accumulated total elapsed time since vehicle completion until EPS control module detects a DTC

NOTE:

  • When the ROOM fuse is removed, and the ignition is switched off, the time is not included in the elapsed time.

The elapsed time when the EPS control module detected a DTC can be calculated by performing the following procedure.

  1. Verify the PID item TOTAL_TIME of the instrument cluster.

  2. Verify the snap shot data item TOTAL_TIME.

  3. Subtract 2 from 1.

VPWR

V

Power supply

VPWR

VSPD

KPH, MPH

Vehicle speed

VSPD

VSPD_STATUS

Stop/

0 – 10 km/h/

Over 10 km/h/

FAIL

Vehicle speed status

  • The EPS control module constantly receives the vehicle speed sent via CAN signal from the instrument cluster.

  • If a DTC is detected, the EPS control module records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.

*1
Fractions of seconds may be indicated after the decimal point

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